$radius-number:5px;//圆角
$color-primary: #2C3E50;  //主题颜色
$black: #000000; //黑色
$black-12: #121212; //一级黑
$black-26: #262626; //二级黑
$black-38: #383838; //三级黑
$black-54: #545454; //四级黑
